Thanks for the rant tiler guy. I wish you the best in your efforts to
belittle people and the DIY spirit via the internet.

This is part of the reason why I'm doing this project myself, you never
know what to expect when you hire folks like "thetiler" to do work.
Whether he does a decent job of not, I don't let guests with this sort
of an attitude into my home, especially if I'm paying them.

Calling someone "stupid" isn't the best way to get anything done, but I
don't expect you to have time to think about etiquette, you're probably
very busy as there's a lot of folks using tile these days.